basically after swapping to a piper 4-1 manifold the oil filter plastic casing, where its closest to two parts of the manifold pipe, has kind of bubbled, and there is a pin prick sized hole in each one as if it has cracked, this is causing oil to drip onto the bottom of the manifold, and therefore causing it to smoke and smell the car/surroundings quite badly (somtimes giving me headaches whilst driving

) im going to citroen/CES tomorrow to buy a new oil filter surround, but am afraid it will happen again. have tried heavy duty sealant (putty etc) to cover the holes, but they dont stand the heat and crack. would i need to heatwrap the manifold, or is there any other way to solve this, all sugestions appreciated!!